Valve-gear.



PATBNTED JULY 5, 1904.

J. E. MONEELY.

VALVE GEAR.

APPLIOATION I'ILBD SEPT. mos.

No MODEL.

Patented July 5, '1904.

UNITED STATES PATENT OFFICE,

JOHN E. MCNEELY, OF INDIANAPOLIS, INDTANA, ASSIGNOR OF ONE-HALF TO HENRY R. COBURN, OF INDIANAPOLIS, lNlHANA.

VALVE-GEAR..

SPECIFICATION forming part of Letters Patent No. '764,490, dated July 5, 1904.

Application filed September ll, 1903. Serial No. 172,'799. (Ne model.)

To (tll whom/ zt may coi Learn: i i

Be it known that I, JOHN E. MCNEELY, of Indianapolis, County of Marion, and State o' Indiana, have invented a certain new and useful Valve-Gear; and 1 do hereby declare that the following is a full, clear, and exact description thereof, reference being' had to the accornpanying drawings, in which like figures refer to like parts.

This invention relates to improvements'in the valVe-gearing o' steam-engines, especially of the Corliss type.

The object of this invention is to do away with the steam-hook and the spring actuating the steam-hoolnbecause of the uncertainty of the action of the steam-hook due to the spring and in order to make the action of the valve more certain and reliable. The spring-controlled stean-hook is liable by reason of the uncertain action of the spring not to hook up after it has been released. This object is aecomplshed by the mechanism hereinafter explained and which will be` understood from the accompanying drawings and the following description and clairns.`

In the drawings, Figure 1 is a perspective View of an admission-valve meohanism with parts broken away. Fig. 2 is an inside elevation of -the crank-plate which is operated from the wrist-plate. Fig. 3 is an outside elevation of the cam-plate which is actuated by the governor and the crank-trip mounted in connection therewith, dotted lines showing altered positions of the parts.

connected. the line 5 5 of Fig. 3.

In detail 10 is a bonnet that is Secured to the cylinder.

11 is the hearing for the valve stem or shaft 12, that extends into the cylinder and operates the valve therein. A hearing 13 is integral with the outer end of the bonnet 10, and upon it there is mounted the cam-plate 14, as shown in Fig. 5. The hearing 13 serves not only as means for mounting the plate 14, but also as a hearing for the valve stern or shaft 12. Hence the plate 14 turns independently of the stem or shaft 12. Said plate 14 is os- Fig. 4 is a detail View ofthe crank with which the dash-pot is Fig. 5 is a horizontal section on the sten or sha't and being elongated in a 5 5 direction in line with the length of the trip, Whereby the trip may havelongitudinal movement. The form of-'the trip 16 in longitudinal section appears in Fig. 5. At its outer end it has a nose 19, which is sharp at one corner and beveled away froni said corner, and said nose is wider than the main body of the trip. There are also two extensions 20 and 21 from the other or inner side of the trip, as seen in Fg. 5, that extend into the 5 `recess 22 in the plate 14. The outer and inner sui-faces of said extensions 20-and 21 are preferably curved. A collar 23 forms the 1nner wall of the reoess 22 ot' the plate 14, as seen in Fig. 5, and the extensions 20 and 21 ot' the 7 trip play between said collar and the outer wall of the recess 22 during' the longitudinal movement of the trip. Cams 24, 25, and 26 are provided in the plate 14 in the outer wall surrounding the reeess 22, so that when the plate 14 is oscillated by the governor-rod 15 these cans Will actuate and regulate the novement of the trip 16. The'carn 24 forces the trip outward by engaging the extension 21 on said trip. or to the left, as shown in Fig. 3. The cam 26 is a safety-cam that holds the trip from catching the stean-erank if the governor fails.

The plate 30 is mountcd upon the stem or shaft 12 outside of and against the earn-plate 5 14 and the trip 16. It is cut out at 31 to provide a place for the trip 16, "for, as seen in Fig. 5, the trip 16 lies against the cani-plate 14 rather than within it. The nose 19 of the trip operates in a notch 32 in the periphery 9 of the plate 30, and the proportions and parts are such that when the trip has been moved outward its nose will extend beyond the pe riphe'y of the plate 30 and when the trip has been moved inward it will not extend beyond 95 the periphery of said plate 30.

The plate 30 has a crank 33, with which a rod 34, that extends from the w'rist-plate of the engine, is

A trip 16 is 5 The cam 25 forces the trip inward connected, so that the wrist-plate oscillates the platc 30. Said plateBOalso has a lugB extending outwardfrorn its periphery.

Upon the outer end of the shaft or stem 12 the crank 36 is keyed. A rod 37, which is pivotally connected with it, runs to and is controlled by the dash-pot below. Said crank 36 lies against the outer surface of the plate 30, but has on its outer end a rearwardly-extending lug 38, which is engaged by the lug 35 from the plate 30, so that if the dash-pot for any reason fails to work said crank will be actuated by the plate 30 from the wrist-plate, In normal operation the oscillation of the plate 30 from the wrist-plate will cause a similar oscillation of the trip 16 and said trip will be forced inward by the releasing-cam and the 'steam shut ofi", and the opposite throw of the plate and -trip 16 will cause the cam 24 to force the trip outward, so that it will each time pick up thecrank 36 and'through it and the stem or shaft 12 open the valve in the cylinder. If the speed becomes too great, the governor, through the rod 15, will move the cam-plate 14 somewhat in the direction of the arrow shown in Fig. 3,

- which will move the releasing-cam 25 downward somewhat, so as to throw the trip'16 sooner than before. and consequently close the valve in the cylinder soonerthan before. In other words, the position of the releasingcam 25 determines the time when the steamvalve is closed, and the position of that. relcasing-cam is controlled by the governor through the red 15 and cam-plate 14.

The safety-cam 26 is provided for service in case the goVernor-belt should break 'or some similar accident should occur. Itcooperates with the cut-out portion or recesson the opposite side of the disk between the cams 24 and 25. The cam 26 whenthe disk 14 is moved `somewhat in the direction opposite to that in which the arrow points-in Fig. 3, as would be the case when the governor should stop operation, would throw the trip nward out of engagementwith the crank 36 in the lower partiof the oscillatory movement of the nose of the trip. It would then fail to lift the steam-crank 'at all, and

therefore the valve in the cylinder wo'uldbe kept closed and' the engine be prevented from racing until the accident should be remedied. l/Vhat I claim as my invention, and desire to secure by Letters Patent, is-- i l. In a'n engine valve-gearing, the combination with a crank, of a sliding trip oscillated from the wrist-plate, and a governor-controlled cam mechanism for sliding said trip into and out of engagement with said crank for actuating and releasing the latter.

2. In an engine valve-gearing, the combination With a crank, of a sliding trip oscillated 'from the wrist-plate, and a governor-controlled cam-plate mounted beside said sliding trip for sliding said trip into and out of engagement with said crank for actuating and releasing the latter.

3. In an engine valve-gearing, the combination with the valve-shai't and a crank thereon, of a governor-controlled cam-plate mounted concentric with said ValVe-shaft, and a trip mounted adjacent said cam-plate so as to be radially slidable and oscillatory by the wrist-plate, said cam-plate being provided with a cam for moving said trip outward into engagenient with said crank, and another cam for withdrawing said trip and releasing said crank.

' 4.' In anengine valve-gearing, the combination with the valve-shaft and a crank thereon, of a disk mounted on the valve-shaft adjacent said crank that is actuated by the wristplate, a *trip radially 'slidable on said shaft which is engaged and oscillated by said disk,

and a governor-controlled cam-plate mounted concentric with said valve-shaft and adjacent the trip and provided with cams for moving said trip into and out ofengagement with said crank.

5. In an engine Valve-gearing, a valve-shaft, a crank thereon with alaterally-extending lug on its end, a dash-pot connection with said crank, a disk loosely mountedwon the Valveshaft adjacent said 'crankand having aradi- `ally-eXtending recess in it, atrip loosely carried in said recess andaadapted when forced outwardto ,engage the luggon :the crank, a wrist-plate connection with 'said: disk for oscillating it and said trip, acam-plate mounted concentric with said ;valve-shaft adjacent said itrip and provided with cam-surfaces i'or moving the trip in either direction,r and a governor connection with said cam-plate for oscillating it' so as to change the position of the cams on said plate with reference to said trip.

- 6. In an engine valve-gearing, avalve-shaft, a bonnet in which said shaft has bearing, saicl bonnet having an e'nlarged bearing on 'its outer end,. a cam-plate mounted on said enlarged hearing concentric with saidshaft and recessed in its outerisurface iso as to leave a pair of oppositely-located inwardly-extend'- ing cams both of which are 'onthe same side of said shaft, a govennorconnection with said cam-plate for turning the sameslightly, a trip adjacent the outer face of said cam-plate and consisting of a bar with a centrally-elongated opening through which the valve-shaft extends and having two lateral extensions into the recess in theside off the cam-plate that are adapted to be engaged by one or the other of the cams in said plate, adisk loosely mounted on said shaft adjacent the cam-plate, and with a recess in itsside in which said trip may lie and be movable and with its periphery within the outward limit of move- IOO IIO

IZO

said disk With the end thereof` adapted to be engaged and Iifted by said trip When it is moved outward, and a dash-pot connection With said crank.

7. In an engine valve-gearing, the combinetion With a erank, of a sliding trip oscillated from the Wrist-plate, and a gove'nor-con-' and a, third cam on the opposite side of the center of said disk for forcing said trip inwa'd and holding it out of engzgement With' said crank when the governor ceases to operates 9. In an engine valve-ge'aring;` the combinetion With a` Valve-shaft and a erank thereon, of a disk loosely mounted on said valve-shaft adjacent said crank, said disk having a lug adapted to engage said emni: and nove it to close the valve, and a Wrist-plate connection With said disk for oscllatng t. i

In Wtness Whereof I have "hereunto afixed my signature in the presence of the witnesses;

herein named.

^ JOHN EqMoNEELY. VVitnesscs:

N ELLIE A LEMONG,

V. I-I. Loonvoon.

moving said trip, tivo of seid, cans being on" one side of the center of seid dsk for movmg said trip outWa'd and returnng the same, 

